test(nvim): add minimal main/master configs

test/nvim/README.md

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+# Neovim test configs
+
+This directory contains minimal Neovim configs for testing `tree-sitter-dotenv` with both
+legacy and rewritten `nvim-treesitter`.
+
+## Files
+
+- `init-main.lua` → `nvim-treesitter` `main` (new API)
+- `init-master.lua` → `nvim-treesitter` `master` (legacy API)
+
+## Run
+
+From the repository root, use isolated app names so test state does not mix:
+
+```bash
+NVIM_APPNAME=ts-dotenv-main nvim -u "$(pwd)/test/nvim/init-main.lua"
+NVIM_APPNAME=ts-dotenv-master nvim -u "$(pwd)/test/nvim/init-master.lua"
+```
+
+## Install parser
+
+Run:
+
+```vim
+:TSUpdate
+:TSInstall dotenv
+```
+
+## Verify
+
+Open a `.env` file and check:
+
+```vim
+:echo &filetype
+```
+
+Expected output: `dotenv`.
+
+### Show the syntax tree
+
+```vim
+:InspectTree
+```

test/nvim/init-main.lua

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+local script_dir = vim.fn.fnamemodify(debug.getinfo(1, "S").source:sub(2), ":p:h")
+local repo_root = vim.fn.fnamemodify(vim.fn.fnamemodify(script_dir, ":h"), ":h")
+
+local lazypath = vim.fn.stdpath("data") .. "/lazy/lazy.nvim"
+if not vim.loop.fs_stat(lazypath) then
+  vim.fn.system({
+    "git",
+    "clone",
+    "--filter=blob:none",
+    "https://github.com/folke/lazy.nvim.git",
+    "--branch=stable",
+    lazypath,
+  })
+end
+vim.opt.runtimepath:prepend(lazypath)
+
+require("lazy").setup({
+  {
+    "nvim-treesitter/nvim-treesitter",
+    branch = "main",
+    lazy = false,
+    config = function (_, opts)
+        require("nvim-treesitter").setup({})
+
+        vim.api.nvim_create_autocmd("User", {
+            pattern = "TSUpdate",
+            callback = function()
+                require("nvim-treesitter.parsers").dotenv = {
+                    install_info = {
+                        path = repo_root,
+                    },
+                }
+            end,
+        })
+
+        vim.filetype.add({
+            filename = { [".env"] = "dotenv" },
+            pattern = { [".env%..+"] = "dotenv" },
+        })
+
+        vim.api.nvim_create_autocmd("FileType", {
+            pattern = "dotenv",
+            callback = function()
+                pcall(vim.treesitter.start)
+            end,
+        })
+    end
+  },
+})
+

test/nvim/init-master.lua

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+local script_dir = vim.fn.fnamemodify(debug.getinfo(1, "S").source:sub(2), ":p:h")
+local repo_root = vim.fn.fnamemodify(vim.fn.fnamemodify(script_dir, ":h"), ":h")
+
+local lazypath = vim.fn.stdpath("data") .. "/lazy/lazy.nvim"
+if not vim.loop.fs_stat(lazypath) then
+  vim.fn.system({
+    "git",
+    "clone",
+    "--filter=blob:none",
+    "https://github.com/folke/lazy.nvim.git",
+    "--branch=stable",
+    lazypath,
+  })
+end
+vim.opt.runtimepath:prepend(lazypath)
+
+require("lazy").setup({
+  {
+    "nvim-treesitter/nvim-treesitter",
+    branch = "master",
+    lazy = false,
+    build = ":TSUpdate",
+    opts = {
+        highlight = { enable = true },
+    },
+    config = function(_, opts)
+        local parser_config = require("nvim-treesitter.parsers").get_parser_configs()
+        parser_config.dotenv = {
+            install_info = {
+                url = repo_root,
+                files = { "src/parser.c", "src/scanner.c" },
+            },
+            filetype = "dotenv",
+        }
+
+        vim.filetype.add({
+            filename = { [".env"] = "dotenv" },
+            pattern = { [".env%..+"] = "dotenv" },
+        })
+    end
+  },
+})
+